Catostomus lahontan

Lahontan Mountain Sucker

Family: Catostomidae · Class: Actinopterygii · Order: Cypriniformes

Conservation status: GNR S2

The Lahontan Mountain Sucker (Catostomus lahontan) is a freshwater fish species belonging to the sucker family Catostomidae. As indicated by its scientific name, this species is associated with the Lahontan Basin region of the western United States. The California Department of Fish and Wildlife ranks this species as S2, indicating it is imperiled in the state with a high risk of extirpation due to restricted range, few populations, steep declines, or other factors. Limited scientific documentation exists for this species in readily available literature. Suckers in the genus Catostomus are typically characterized by their elongated bodies, inferior mouths adapted for bottom feeding, and barbels used for detecting food in substrate. These fish generally inhabit freshwater streams, rivers, and lakes, where they feed on algae, detritus, and small invertebrates by grazing along the bottom. Species in this genus are often important components of aquatic ecosystems, serving as both consumers of organic matter and prey for larger fish, birds, and other predators. The Lahontan Basin, from which this species derives its name, encompasses portions of Nevada, California, and Oregon and historically contained ancient Lake Lahontan during the Pleistocene epoch. This region supports several endemic fish species that evolved in isolation within closed basin systems. Many native fish species in the Lahontan Basin face conservation challenges due to habitat modification, water diversions, introduced species, and climate change impacts. The S2 ranking suggests the Lahontan Mountain Sucker may be experiencing similar pressures. Without comprehensive biological studies, specific details regarding this species' physical characteristics, precise distribution, habitat requirements, reproductive biology, and current population status remain poorly documented. The taxonomic validity and relationships of this species within the Catostomus genus may require further investigation using modern genetic techniques. Scientific documentation for this species remains extremely limited. The information presented here is based on taxonomic records and general knowledge of the genus Catostomus. We welcome contributions of verified scientific data, photographs, or field observations to enhance this species account. Please contact Species List Pro to share additional information about the biology, distribution, or conservation status of the Lahontan Mountain Sucker.

Data from The California Species Project — 14,000+ California species with verified data from CNPS, CDFW, USFWS, and more.